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Sac & Story county IA | No hydraulics. I use the straps that you would tie down a load of lumber on a flatbed. About 80:1 reduction gearbox and 2 hp motor. Not done in these pictures, but you get the idea.
 (door1.JPG)
 (door4.JPG)
 (door3.JPG)
 (door7.JPG)
 (door6.JPG)
 (door5.JPG)
Attachments
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 door1.JPG (88KB - 96 downloads)
door4.JPG (89KB - 89 downloads)
door3.JPG (88KB - 90 downloads)
door7.JPG (111KB - 86 downloads)
door6.JPG (112KB - 92 downloads)
door5.JPG (46KB - 90 downloads)
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Large doors foor shop
